Elastic, piezooptic and acoustooptic properties of SrB4O7 and PbB4O7 crystals

In this paper we analyse acoustooptic properties of ferroelastic crystals. It is shown that proper ferroelastics are the most attractive materials for utilisation in acoustooptic devices, due to low velocities of acoustic waves caused by anomalous behaviour of elastic properties in the vicinity of phase transition. A number of new ferroelastic compounds promising for acoustooptic applications are described.

Section: Discussionmentioning

confidence: 99%

Ferroelastic crystals as effective acoustooptic materials

Vlokh¹,

Martynyuk-Lototska²

2009

“…A wide range of their optical transparency, particularly in the ultraviolet (UV) spectral region [7][8][9][10][11] (up to 125 nm for 4 7 SrB O [10, 11]), and a high level of optical damage threshold [11,12] make them one of the best materials for operation of short-wavelength high-power laser radiation. As shown in the works [13][14][15][16][17][18][19][20], some of the borate crystals also manifest high enough acoustooptic figure of merit (abbreviated hereafter as AOFM). We have reported in our previous papers [14,18] that, for example, -BaB 2 O 4 (the point group of symmetry 3m) is characterised with very low transverse acoustic wave velocities and could therefore be used as a promising acoustooptic (AO) material.…”

Section: Introductionmentioning

confidence: 99%

“…However, the paratellurite is not transparent in the deep UV spectral range and the range of its transparency is limited by the wavelength of 350 nm [21]. On the other hand, KDP and SiO 2 crystals are transparent down to 250 nm and 150 nm, respectively, though their AOFM is rather low, 15 [14].…”

Section: Introductionmentioning

confidence: 99%

Highly efficient acoustooptic diffraction in alpha-BaB2O4 crystals: improving of geometry of acoustooptic interaction

Martynyuk-Lototska¹

2012

Abstract.In the present work we show experimentally on the example of -BaB 2 O 4 crystals that a choice of the slowest acoustic wave for acoustooptic interaction made on the basis of acoustic anisotropy of crystals can essentially increase the acoustooptic figure of merit. The latter parameter for -BaB 2 O 4 obtained by us is equal to M 2 =(211±31)10 -15 s 3 /kg. We demonstrate that the acoustooptic diffraction efficiency in -BaB 2 O 4 increases for shorter wavelengths of optical radiation and reaches almost ~ 75% at the wavelength 325 nm (at the acoustic signal power 0.04 W). This fact, along with transparency of those crystals in the ultraviolet spectral range and their high resistance against a powerful laser radiation, make them attractive materials for operating high-power ultraviolet laser radiation.

“…They are widely used in parametric optical oscillators as functional elements [13,14]. Recently we have shown that the borate crystals may also be used as acoustooptic materials, in particular for acoustooptic operation of laser radiation in the short-wavelength spectral range [15][16][17][18][19][20][21][22][23]. We should also notice that the acoustooptic interactions do not require a lack of centre of symmetry, being possible even in the isotropic glasses.…”

Section: Introductionmentioning

confidence: 99%

Kerr and Faraday effects in borate glasses

Adamenko¹,

Адамів²,

Klymiv³

et al. 2011

Electrooptic Kerr and magnetooptic Faraday effects are studied in LiKB 4 O 7 , Li 2 B 6 O 10 and LiCsB 6 O 10 glasses. The corresponding quantitative coefficients are determined for the wavelength of 632.8 nm. It is shown that the above compounds can be used as electrooptic and magnetooptic materials which are highly resistant to powerful optical radiation and transparent in the ultraviolet spectral range.